$ git clone -n https://github.com/xcp-ng-rpms/blktap /var/lib/mock/v8.3-incoming-10680-29231/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-incoming-10680-29231/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin de4e9ff47c97626340db1152096447a989b27451:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         de4e9ff47c97626340db1152096447a989b27451 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de4e9ff Merge pull request #13 from xcp-ng-rpms/pcoval/review/master